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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Aries on August, 19 2017
High Precision Live Sky Chart
02h 02m 50s
+20° 43’ 03”
8.81
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 69.3°
Max altitude: 59.2°
Azimuth: 290.7°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Aug 12 8.96 01h 54m 51s +19° 43’ 28” Aries
2017 Aug 13 8.94 01h 56m 03s +19° 52’ 20” Aries
2017 Aug 14 8.92 01h 57m 15s +20° 01’ 06” Aries
2017 Aug 15 8.90 01h 58m 23s +20° 09’ 45” Aries
2017 Aug 16 8.88 01h 59m 32s +20° 18’ 15” Aries
2017 Aug 17 8.85 02h 00m 39s +20° 26’ 39” Aries
2017 Aug 18 8.83 02h 01m 45s +20° 34’ 54” Aries
2017 Aug 19 8.81 02h 02m 50s +20° 43’ 03” Aries
2017 Aug 20 8.79 02h 03m 55s +20° 51’ 02” Aries
2017 Aug 21 8.76 02h 04m 57s +20° 58’ 54” Aries
2017 Aug 22 8.74 02h 05m 57s +21° 06’ 38” Aries
2017 Aug 23 8.72 02h 06m 57s +21° 14’ 12” Aries
2017 Aug 24 8.69 02h 07m 55s +21° 21’ 38” Aries
2017 Aug 25 8.67 02h 08m 53s +21° 28’ 57” Aries

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23144130
Orbit inclination i 5.52316903°
Perihelion distance q 1.83361451 AU
274,304,827 km
Aphelion distance Q 2.93795207 AU
439,511,374 km
Semi-major axis a 2.38578329 AU
356,908,101 km
Orbital period period 3.6900 years
1,345.9996 days
Date of perihelion transit Tp 2017-Nov-18 08:10:28
2,458,075.8406 JD
Argument of perihelion peri 145.31451542935°
Longitude of the ascending node node 259.56450542886°
Mean anomaly M 339.84945924639°
Mean motion n 0.26745923°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.